Date: Thu Apr 12 11:34:52 2007

Author: Wolfgang Rueckner

Subject: Re: Monkey Gun/Shoot Demo

Post:
Ours has never failed. Look at

http://www.fas.harvard.edu/~scidemos/NewtonianMechanics/
ShoottheMonkey/ShoottheMonkey.html

-- Wolfgang


On Apr 12, 2007, at 11:11 AM, Douglas Johnson wrote:

>
> On our Monkey Shoot or Monkey Gun Demo, we have an electronic
> trigger circuit that trips off the power to the electromagnet that
> holds the monkey up and then resets after 5 seconds after it falls.
> Lately, it hasn't been very dependable. Does anyone out on Tap-L
> have a bullet proof circuit for such a demo? I am tempted to go
> back to our mechanical trigger.
>
> ....Doug J.
>
> http://parallax.sci.csupomona.edu/e107/showdemo.php?demindex=ME-D-ML
>
> PS.. Right now we use a laser diode and a photo detector at the
> end of the barrel of the gun for the switch sensor circuit.



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